Cutting-tool.



V PATENTED JUNE 25, 190 w. 1). ALLEN & G. A. JOHNSON.

GUTTING TOOL. APIfLIOATION FILED SEPT. 7. 1906.

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PATENTED JUNE 25, 1907. W. D. ALLEN & G. A. JOHNSON.

CUTTING TOOL. APPLICATION FILED SEPT. 7. 1906.

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UNITED STATES PATENT OFFICE.

WILLIAM D. ALLEN AND CUsTAvE A. JOHNSON, OF NEW HAVEN, CONNECTI CUT,ASSIGNORS To MARLIN FIRE ARMs COMPANY, OF NEW HAVEN, CONNECTICUT, ACORPORATION OF CO NECTICUT.

CUTTING-TOOL.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed September 7.1906. Serial No- 333,586.

To all whmn it may concern.-

Be it known that we, WILLIAM D. ALLEN and GUsTAVE A. JoHNsoN, citizensof the United States, both residing at New Haven,

New Haven county, Connecticut, have invented certain new and usefulImprovements in Cutting-Tools, of which the following is a full, clear,and exact description.

Our invention relates to improvements in tools, and particularly forautomatic taper cutting. I

Our former patent No. 831,316, dated September 18, 1906 shows theprinciples of the machines with which our present inven tion isparticularly intended for use. It is. what is commonly known as anautomatic cutting machine, in which the stock is a wirelike rod fedthrough the head of the machine. The cutting tools are carried usuallyby a turret rotatable on a vertical axis and movable longitudinallytoward and from the stock. Other cutting tools are also sometimesprovided, for instance, for cutting-off operations, which tools aremoved transversely of the work aXis.

Our former patent No. 834,877 dated. November 6, 1906, illustrates ataper cutting tool embodying the principles of this invention. Theimprovements in this application reside principally in the means ofconnection between the cutter and saddle blocks and in a centralabutment for steadying the tip of the stock during the cuttingoperation.

Figure 1 is an end view of a tool embodying the improvements of ourinvention, Fig. 2 is a longitudinal section of the same taken on theplane of the line XX, Fig. 1, looking showing a fragment of the end ofthe stock after the cutting operation. Theoutline of the tool is alsoshown dotted in a position which it occupies as it moves to the position shown in full lines after the cutting operation. Fig. 3 is abottom plan. view of the tool, Fig. 4 is a detail view of one of theconnecting links, Fig. 5 is a detail view of the other connecting link,Fig. 6 is a detail view of a bearing-block forming art of the connectionbetween the links, Eig. 7 is a detail I longitudinal sectional view ofthe central abutment for the stock.

The body 1 of the tool has a shank 2, which is adapted to be removablysecured in the usual turret. The cutter-carrying block 3 and asaddle-carrying block 4 are mounted in guide-ways in the end of the toolin which they are adapted to slide toward and from the axis of the tool.

The cutter 5 and saddle 6 are suitably secured in the carrier blocks 3and 4. The two carrier blocks are normally pressed outwardly by means ofa suitable spring (not shown). Their outward movement is lim ited byadjustable screw stops 7 and 8. The carrier blocks are connected bylevers 9 and 10 pivoted to the body of the tool by screws 11 and 12,respectively. A screw 13 passes through the double arm end 14 of thelever 9, and also through the bearing nut or block 15, which fitsloosely in the notch 16 in lever 10. The screw 17 which takes into thecutter block 3 has its shank adapted to the notch 18 in link 9, whilethe screw 19 which takes into the saddle block 4 has-its shank adaptedto the notch 20 in lever 10. By means of this construction the twocarrier blocks move in and out in their guide-ways simultaneously, andthere is little opportunity for the parts to bind. The constructionbeing simple, there is little likelihood of the parts being thrown outof adjustment or being clogged with dirt or chips from the work.

The stock 21 is fed through the head of the machine in the usual mannerand the end given a tapering cut, as shown at 22, by means of the tool.In our former application, the saddle corresponding to saddle 6is reliedupon to steady the work during the cutting operation, but in some casesit is found desirable to give a further support to the stock. For thispurpose, we have provided a central abutment, whose recessed end 23receives a small tip 24 formed on the end of the stock. The body 25 ofthis abutment is guided in a longitudinal recess in the body of the tooland has a shank-26 guided in the sleeve 27, which is clamped in theshank of the tool by the screw 28. The spring 29 located between thebody 25 of the abutment and the sleeve 27 holds the abutmeillt in itsproper position relative to the too As the tool is moved toward thestock during the cutting operation, the abutment remains stationary andholds the tip of the stock rigid. When the tool is retracted, the

stock is released from the abutment after the tool passes to the rightof the position shown in Fig. 2.

The advantages of this construction will be apparent to those acquaintedwith this art.

WVhat we claim is:

1. In a taper cutting tool, a body, radial guide-ways in said body atopposite sides of the center, a member mounted to slide in eachguide-way, a pair of levers pivoted to the body near the margin thereofon separate fulcrums, a pin and slot connection between the inner endsof said levers, and a pin and slot connection between each lever and oneof the members.

2. In a taper cutting machine, a body and a shank, both provided with acentral, longitudinal passage, radial guide-Ways in said body atopposite sides of the center, a mem-' ber mounted in each of saidguide-Ways, means to simultaneously move both of said members toward andfrom each other, a spring-pressed abutment mounted to slide in saidpassage normally engaging the inner faces of said members, and a smallercentral projection therefrom extending flush with the outer faces ofsaid members, said projection provided with a recess at its extremity toengage the stock.

WILLIAM D. ALLEN. G. A. JOHNSON.

Witnesses:

M. M. SHEEHAN, F. M. DANNENFELSER.

